Bioactive coating with a low-friction surface
CA 2244049 A1 · Owner: Anders, Christine · Inventors: Anders, Christine; Ottersbach, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a copolymer derived from monomers comprising: (A) maleic anhydride; (B) at least one vinyl alkyl ether having an alkyl radical of 1 to 6 carbon atoms; (C) at least one vinyl monomer containing a carboxyl or carboxylate group; and (D) at least one vinyl monomer containing a sulfuric acid, sulfate, sulfonic acid or sulfonate group. The copolymer is useful for the production of products for use in the fields of foodstuffs and tobacco, the water industry and bioengineering, hygiene provision and, in particular medicine.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.